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Technical details

Application Efneo’s GTRO Gearbox is dedicated for all non-competition bikes like touring, city, e-bike, folding, recumbent, trike. It has been heavily tested in various conditions (on-road, off-road and labmoratory tests, including winter tests). However, it has not been tested for competition MTB, downhill or dirt applications.

Gear ratio GTRO’s 1st gear is a neutral gear (1:1). Second and third gears are incremental. GTRO’s standard chainring is 28T.

Chris review

Franek,

So, I’ve put about 500 miles on the gearbox and i can say that it was totally worth the wait. I am including some pictures of my rig. Right now I am riding a Surly Big Dummy as a daily commuter. I live in the NC foothills and need to transport a fair amount of gear on a daily basis. For the drivetrain, I wanted something that was low maintenance…no derailleurs. The rear hub is a Nuvinci N360 which pairs well with the Efneo gearbox. With 3 gears up front and a CVT in the rear I have an almost infinite range of gear ratios.

The Efneo gearbox was easy to install, about 10 to 15 minutes. Shifting is super smooth and my top speed has increased by about 25%. One of my favorite things about this crank is that the physical 28T sprocket provides a huge amount of chain wrap. This means I am driving more power to the pedal even when I drop to the 40T and 50T settings. This will definitely be a must have for all future builds. let me know if you would like any other photos or testimonials.

Regards, Christopher

Buy Efneo’s GTRO

How to order?

Choose your GTRO’s options and check out. If you want to order two or more GTROs of different configuration, choose your first configuration, click “add to basket” and then you’ll be able to come back to this place to choose
another configuration.

Configuration

Color

Silver

Silver

Shifter

Bar-end

Bar-end

Rapid-fire

Grip-shift

Bottom bracket

68 mm

68 mm

100 mm (Fat bike)

Bicycle type

Standard 26-29 inch wheel bike

Standard 26-29 inch wheel bike

Another folding bike brand

Brompton - GTRO with 37T chainring

Sondors Fat E-bike

Strida - GTRO with an adapter for a beltring

Trike / Recumbent

We ship to the United States, Canada, European Union (including the UK), Switzerland, Japan and Australia.

In the Box

Total Price

$499.00

GTRO in other configurations

In near future we will be offering a GTRO in other options: color – black.
If you’re interested in purchasing a GTRO with such option(s) please leave us your e-mail.
We will update you as soon as it’s available.
Check below in which option you are interested.

Color: black

Beltring (instead of a chainring)

Order to your country

At this moment GTRO is only available in selected countries.
Please leave us your e-mail and your country name – we will inform you as soon
as GTRO is available in your country!